Question

The height of a cone is 21 cm and slant height is 28 cm. Find the Total surface area of cone

The height of a cone is 21 cm and slant height is 28 cm. Find the Total surface area of cone.

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Answer 1

Answer:

h=21 cm

l=28 cm

r=l2−h2

r=77 cm

Therefore,

Area of base = πr2=722×(77)2=1078 cm2

Step-by-step explanation:

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Answer 2

Answer:

Step-by-step explanation:

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